Sigma Rules
1,709 rules found
PowerShell Get-Process LSASS
Detects a "Get-Process" cmdlet and it's aliases on lsass process, which is in almost all cases a sign of malicious activity
Abuse of Service Permissions to Hide Services Via Set-Service
Detects usage of the "Set-Service" powershell cmdlet to configure a new SecurityDescriptor that allows a service to be hidden from other utilities such as "sc.exe", "Get-Service"...etc. (Works only in powershell 7)
Suspicious PowerShell IEX Execution Patterns
Detects suspicious ways to run Invoke-Execution using IEX alias
Root Certificate Installed From Susp Locations
Adversaries may install a root certificate on a compromised system to avoid warnings when connecting to adversary controlled web servers.
Suspicious Invoke-WebRequest Execution
Detects a suspicious call to Invoke-WebRequest cmdlet where the and output is located in a suspicious location
Suspicious Kerberos Ticket Request via CLI
Detects suspicious Kerberos ticket requests via command line using System.IdentityModel.Tokens.KerberosRequestorSecurityToken class. Threat actors may use command line interfaces to request Kerberos tickets for service accounts in order to perform offline password cracking attacks commonly known as Kerberoasting or other Kerberos ticket abuse techniques like silver ticket attacks.
Malicious PowerShell Commandlets - ProcessCreation
Detects Commandlet names from well-known PowerShell exploitation frameworks
Potential PowerShell Obfuscation Via WCHAR/CHAR
Detects suspicious encoded character syntax often used for defense evasion
Execution of Powershell Script in Public Folder
This rule detects execution of PowerShell scripts located in the "C:\Users\Public" folder
RemoteFXvGPUDisablement Abuse Via AtomicTestHarnesses
Detects calls to the AtomicTestHarnesses "Invoke-ATHRemoteFXvGPUDisablementCommand" which is designed to abuse the "RemoteFXvGPUDisablement.exe" binary to run custom PowerShell code via module load-order hijacking.
Tamper Windows Defender Remove-MpPreference
Detects attempts to remove Windows Defender configurations using the 'MpPreference' cmdlet
Potential Powershell ReverseShell Connection
Detects usage of the "TcpClient" class. Which can be abused to establish remote connections and reverse-shells. As seen used by the Nishang "Invoke-PowerShellTcpOneLine" reverse shell and other.
Run PowerShell Script from ADS
Detects PowerShell script execution from Alternate Data Stream (ADS)
Run PowerShell Script from Redirected Input Stream
Detects PowerShell script execution via input stream redirect
PowerShell SAM Copy
Detects suspicious PowerShell scripts accessing SAM hives
Suspicious Service DACL Modification Via Set-Service Cmdlet
Detects suspicious DACL modifications via the "Set-Service" cmdlet using the "SecurityDescriptorSddl" flag (Only available with PowerShell 7) that can be used to hide services or make them unstopable
PowerShell Script Change Permission Via Set-Acl
Detects PowerShell execution to set the ACL of a file or a folder
PowerShell Set-Acl On Windows Folder
Detects PowerShell scripts to set the ACL to a file in the Windows folder
Deletion of Volume Shadow Copies via WMI with PowerShell
Detects deletion of Windows Volume Shadow Copies with PowerShell code and Get-WMIObject. This technique is used by numerous ransomware families such as Sodinokibi/REvil
Exchange PowerShell Snap-Ins Usage
Detects adding and using Exchange PowerShell snap-ins to export mailbox data. As seen used by HAFNIUM and APT27
Suspicious PowerShell Download and Execute Pattern
Detects suspicious PowerShell download patterns that are often used in malicious scripts, stagers or downloaders (make sure that your backend applies the strings case-insensitive)
Suspicious PowerShell Parameter Substring
Detects suspicious PowerShell invocation with a parameter substring
Suspicious PowerShell Parent Process
Detects a suspicious or uncommon parent processes of PowerShell
Powershell Token Obfuscation - Process Creation
Detects TOKEN OBFUSCATION technique from Invoke-Obfuscation
Suspicious Uninstall of Windows Defender Feature via PowerShell
Detects the use of PowerShell with Uninstall-WindowsFeature or Remove-WindowsFeature cmdlets to disable or remove the Windows Defender GUI feature, a common technique used by adversaries to evade defenses.
Net WebClient Casing Anomalies
Detects PowerShell command line contents that include a suspicious abnormal casing in the Net.Webclient (e.g. nEt.WEbCliEnT) string as used in obfuscation techniques
Sensitive File Dump Via Print.EXE
Detects the abuse of the Print.exe utility for credential harvesting which involves using Print.Exe to copy sensitive files such as ntds.dit, SAM, SECURITY, or SYSTEM from the Windows directory in order to extract credentials, locally or remotely.
Suspicious Provlaunch.EXE Child Process
Detects suspicious child processes of "provlaunch.exe" which might indicate potential abuse to proxy execution.
PUA - 3Proxy Execution
Detects the use of 3proxy, a tiny free proxy server
PUA - Suspicious ActiveDirectory Enumeration Via AdFind.EXE
Detects active directory enumeration activity using known AdFind CLI flags
PUA - AdFind Suspicious Execution
Detects AdFind execution with common flags seen used during attacks
PUA - AdvancedRun Suspicious Execution
Detects the execution of AdvancedRun utility in the context of the TrustedInstaller, SYSTEM, Local Service or Network Service accounts
PUA - Chisel Tunneling Tool Execution
Detects usage of the Chisel tunneling tool via the commandline arguments
PUA - CleanWipe Execution
Detects the use of CleanWipe a tool usually used to delete Symantec antivirus.
PUA - Crassus Execution
Detects Crassus, a Windows privilege escalation discovery tool, based on PE metadata characteristics.
PUA - CsExec Execution
Detects the use of the lesser known remote execution tool named CsExec a PsExec alternative
PUA - DefenderCheck Execution
Detects the use of DefenderCheck, a tool to evaluate the signatures used in Microsoft Defender. It can be used to figure out the strings / byte chains used in Microsoft Defender to detect a tool and thus used for AV evasion.
PUA - DIT Snapshot Viewer
Detects the use of Ditsnap tool, an inspection tool for Active Directory database, ntds.dit.
PUA - Fast Reverse Proxy (FRP) Execution
Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet.
PUA- IOX Tunneling Tool Execution
Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
PUA - Kernel Driver Utility (KDU) Execution
Detects execution of the Kernel Driver Utility (KDU) tool. KDU can be used to bypass driver signature enforcement and load unsigned or malicious drivers into the Windows kernel. Potentially allowing for privilege escalation, persistence, or evasion of security controls.
PUA - Memory Dump Mount Via MemProcFS
Detects execution of MemProcFS a memory forensics tool with the '-device' parameter. MemProcFS mounts physical memory as a virtual file system, allowing direct access to process memory and system structures. Threat actors were seen abusing this utility to mount memory dumps and then extract sensitive information from processes like LSASS or extract registry hives to obtain credentials, LSA secrets, SAM data, and cached domain credentials. MemProcFS usage that is not part of authorized forensic analysis should be treated as suspicious and warrants further investigation.
PUA - Netcat Suspicious Execution
Detects execution of Netcat. Adversaries may use a non-application layer protocol for communication between host and C2 server or among infected hosts within a network
PUA - Ngrok Execution
Detects the use of Ngrok, a utility used for port forwarding and tunneling, often used by threat actors to make local protected services publicly available. Involved domains are bin.equinox.io for download and *.ngrok.io for connections.
PUA - Nimgrab Execution
Detects the usage of nimgrab, a tool bundled with the Nim programming framework and used for downloading files.
PUA - NirCmd Execution As LOCAL SYSTEM
Detects the use of NirCmd tool for command execution as SYSTEM user
PUA - NPS Tunneling Tool Execution
Detects the use of NPS, a port forwarding and intranet penetration proxy server
PUA - NSudo Execution
Detects the use of NSudo tool for command execution